Patent GB-191401278-A (GB)
Title: Improvements in or relating to Mechanism for Operating on the Heel Ends of Boots and Shoes.
IPC: A43D8/04
Filed: 1914-01-16
Granted: 1915-04-16
Abstract: 1278. Hoyle, W., Ashworth, H., Gouldbourn, J., Bates, A., Jerram, A. E., and British United Machinery Co. Jan. 16. Uppers, machines for.-A machine for moulding the heel ends of shoe uppers prior to pulling- over. and lasting, comprising inner and outer moulds and wipers for wiping the upstanding margin of the upper over the tread face of the inner mould, is provided with automatically - operated means to force the wipers downwards to compress the inturned flange after they have been moved forwards to wipe in the margin of the upper. The machine may also be provided with grippers to engage the upper at the shank and pull it about the inner mould prior to the moulding operation. Two sets of moulding and wiping devices are provided, each of which comprises an inner mould B, Figs. 1 and 2, rigidly secured to a cross-beam A<12> supported on forward extensions A<11> of the upper part of the machine frame A, and an outer mould comprising two formers C, which are con. nected to a slider C' by equalizing-links C' and swivel joints and are loosely pivoted at C<4>* to a floating plate C<4> frictionally clamped by a spring-pressed bolt C<3>, Fig. 4, against the lower surface of the slider C<2>. The slider C<2> is yieldingly advanced through springs C<5>, Fig. 2, a cross-head C<6>, and connexions C7, C<8>, C<9>, C<10>, with a cam on a countershaft A<10>, Fig. 1, and, during this movement, the formers are swung inwards by the engagement of cam-surfaces C", Fig. 2, carried by them, with rolls C<12> on the machine frame. The wipers comprise two spring-pressed side p'ates D', D', Fig. 7, pivoted upon a loose holder D<5> located within a frame D<6>, Fig. 1, and an end plate D*, Fig. 7, fixed to the underside of the holder D<5>. As the frame D<6> is advanced, the side plates D', D<2>, which carry cam-surfaces D<8>, are closed by rolls D<9> on the slider C<2> and are then moved further forwards to enable the end plate D* to wipe in the back of the heel. The mechanism for advancing the wipers comprises a cam-actuated yoke D", Fig. 1, pivoted to one arm of a bell-crank D<12>, the other arm of which is connected by a link D<13> to one arm of a second bell-crank D<14> fulcrumed at D<15> on a rearward extension of the wiper-carrying frame D<6> ; the second arm of the bell-crank D" carries a roller D<16>, Figs. 1 and 4, adapted to travel along a camsurface D<17> on the machine frame. The bell-crank D" is also connected by a link to a thrust-bar D<18> adapted to operate two spring-pressed toggles D<19>, D<20>, the arms of which are connected respectively to adjustable spring-plungers D<21> and to the loose holder D<5> of the wiper plates ; the toggles may be eccentrically toothed, as shown in Fig. 4, to increase their throw. In operation, after a certain amount of forward movement has been given to the frame D<6> by the link D<13>, the roller D<16> reaches a dip in the cam D<17>, and the bell-crank D<14> is then turned about its pivot D<15> instead of being moved forwards. As the bell-crank turns, the thrust-bar D<18> straightens the toggles, and a flange-compressing movement is communicated to the wipers. In the reverse movement of the link D<13>, the bar D<18> is first retracted to break the toggles, and the wipers are lifted by springs D<19>*, D<20>* connecting the ends of the toggles, after which a projection D<25> on the bellcrank D" engages a stop-face on the frame D<6> to limit the turning movement of the bell-crank, and the continued movement of the link D<13> then withdraws the frame D<6>. The grippers for positioning the upper on the inner mould before the outside formers engage the work are arranged on either side of the upper adjacent to its shank, and each comprises a fixed jaw E<5>, Fig. 3, formed on a radial arm E projecting from a sleeve E<2>, Figs. 1, 2, and 9, mounted to slide freely on a rod E', and a movable jaw E<7>* formed on an arm E<7> adapted to slide on a T-shaped rib projecting from the arm E. The arm E' is actuated through rack-andpinion gearing shown in Fig. 1, a bell-crank F3 pivoted on the wiper frame D<6>, and a rod F<5>, from the treadle mechanism, the rod F<5> being moved to actuate the grippers before the main clutch is thrown into gear. As the arm E' moves forwards, it actuates a bell-crank E<8>, Fig. 9, which moves the arm E<7> to close the grippers on to the work, after which the sleeve E<2> moves with the arm E' and carries with it the gripper to stretch the upper. When the clutch is tripped, the movement of the frame D<6> actuates the bell-crank F<3> and the rack- and-pinion gearing in the reverse direction, and the rod E<1> is moved backwards, causing the grippers to release the upper, after which the grippers are swung upwards out of the way of the work ; this is effected by a roll E<3> on the rod E' moving into the inclined portion of a cam-slot E<12> in the sleeve E<3> and causing the sleeve to rotate about the rod E<1>. Either the inner or the outer moulds, or both, may be heated by gas or by electricity. Specification 24,760/14 is referred to.